Timing device



.Sept. 15, 1959 EN 2,904,110

TIMING DEVICE Filed July 14, 1954 v 3 Sheets-Sheet 1 Sept. 15,1959

Filed July 14, 1954 R. 'B. EGGEN TIMING DEVICE 3 Sheets-Sheet 2 IN VENTOR.

' Fdykah JZ Zygerz Sept. 15, 1959 v R. B. EGGEN TIMING DEVICE Filed July14, 1954 s Sheets-Sheet s Z/z E v United States Patent C 2,904,111)TIMING DEvicE Raymond B. Eggen, Detroit, Mich. Application July 14,1954, Serial No. 443,315 16 Claims. 01. 1611) The present inventionrelates generally to timing devices and, more particularly, to timingdevices capable of performing a series of control operations atdefinitely timed intervals.

Heretofore, various types of timing devices have been suggested andused. While some of these have been satisfactory in their use, they werecomplicated and expensive in their construction and maintenance.Accordingly, it is the primary object of this invention to provide animproved timing device which is simple and inexpensive in itsconstruction and maintenance, and at the same time, one which isaccurate and easy to operate.

It is another object of the invention to providean improved timingdevice which consists of a minimum number of parts, and one which can beconveniently used.

It is a further object of this invention to provide an improved timingdevice which can be easily and quickly reset after one desired timecycle of operation has elapsed for the next time cycle, and at .the sametime, a timing device in which the setting is more accurate and positivethan any other timer heretofore proposed. i

It is a still further object of this invention to provide a timingdevice especially adapted for on and off .operations, as for example,starting a movie camera after a first desired time interval and stoppingit after a second desired time interval.

It is another object of this invention to provide a timing devicecapable of being used in numerous associations, as for example, withcameras, radios, .gas

stoves, and the like.

Other objects and advantages of the invention will become apparent fromthe following detailed description of the embodiments illustrated in theaccompanyingdrawings, in which:

Figure 1 is a perspective view of a timing-device embodying the featuresof the invention and being mounted on a movie camera for use therewith;

Figure 2 is a rear elevational view of the timing device illustrated inFigure 1;

Figure 3 is a'horizontal view, partly in section, of the structureillustrated in Figure 2, taken along the line 3--3 thereof;

Figure 4 is an elevational view, partly in section, of the structureillustrated in Figure 2, taken alonglthe line 4-4 thereof;

Figure 5 is a rear elevational view, similar to theFigure 2, of thetiming .device illustrated in Figure 1, but showing the control memberin a position for the start of a timing cycle; 7

Figure 6 is a rear elevational view of asecond timing device embodyingthe features of the invention;

Figure 7 is a horizontal view, partly in-section, of the structureillustrated in Figure 6, taken along the'line 7-7 thereof;

Figure 8 is an elevational view, partlyjin section, of

the structure illustrated in Figure 6, taken. alongjthecline .8-8thereof;

2,904,110 Patented Sept. 15, 1959 2 Figure 9 is a front elevational viewof a third timing device embodying the features of the invention;

; Figure 10 is an elevational view, partly in section, of the structureillustrated in Figure 9, taken along the line ice : Ill-10 thereof;

cam means employed in the timing device illustrated in Figs. 9-11.

Referring more particularly to the drawings, in Figure 1 there isillustrated a first embodiment of the improved timing device, indicatedby the numeral 10, which is shown mounted for operation on aconventional movie camera 12. The timing device 10 comprises a housingor body member having top and bottom Walls 14 and 16 respectively, sidewalls 18 and 20, and a front wall 22. There is no back wall shown butone may be provided if desired.

As is best seen in Figure 3, a conventional clock-work 7 mechanism 24 isprovided between the front wall 22 and T an intermediate wall 25 and maybe held therebetween by any suitable means. The clock-work mechanism 24is adapted to drive the shaft 26 which fixedly carries on the front endthereof a control element or indicator 28 I and on the rear end thereofa drive gear 30. The drive gear 30 meshably engages a similar drivengear 32 which is fixed on the rear end of a rotatable shaft 34 which isjournaled in the intermediate wall 25 and the front wall 22. The shaft34 is adjustable axially and carries on the I front end thereof a secondcontrol element or indicator 36. Intermediate the indicator 36 and thefront wall 2 2 is a spring biasing means 38 adapted to bias the shaft 34forwardly into its normal position but which permits the shaft 34 to beadjusted axially to permit adjustment of driven gear 32 relative todrive gear 30. A spacer washer 41 is provided between the intermediatewall 25 and driven gear 32. A support member 40 is provided between theintermediate wall 25 and front wall 22 and surrounding shaft 34. Thenumeral 42 indicates the position of indicator 36 when the shaft 34 isaxially adjusted to disengage driven gear 32 from drive gear 30,

"and the position of driven gear 32 in such case is indicated by thenumeral 44. The indicators 28 and 36 may be suitably fixed on theirrespective shafts as by the set screw 37.

As is best seen in Figure 1, the front wall 22 is provided .onthe outerside thereof with indicia which could indicate seconds, minutes orhours, dependingon the type clock work mechanism used and the purposefor which the timing device is to be used. The indicia is used forsetting theindicators 28 and 36.

Theupper portion of the side -wall 20 is provided with ,an aperture 46therethrough in which is slidably mounted aca'rrier member 48 having anenlarged head portion 50.

, Thejcarrier member 48 is provided with an axial aperture 52 which isadapted to slidably carry the rear end of a control member 54. The upperportion of the side wall 18 is provided with an aperture 56 therethroughin which 5431s by the set screw 60. A biasing means 62 is carried 'bythe control member 54 between the side wall 18 and the collar 58.

Another biasing means 64 is carried by j the control member 54 betweenthe collar 58 and the carrier head portion 50.

As is best seen in Figures 2 and 3, a pin 66 having a head portion 68 iscentrally located in the intermediate wall 25 and pivotally carriesthereon a pair of releasable holding means 70 and 72 adapted to engagethe collar 58 and head portion 50 respectively. The holding means 70comprises a substantially horizontal portion 74 integral with asubstantially vertical cam follower portion 76. The horizontal portion74 is provided with a pin 78 against which is acting a leaf spring 80having an anchor means 81. The leaf spring 80 acts to bias holding means70 upwardly so that a catch 82 on means 70 will engage the collar 58 andhold it until the cam follower 76 is actuated to release collar 58 in amanner as explained more fully later on herein. A pin 84 is provided onthe driven gear 32 and is adapted to engage a portion 86 on the camfollower portion 76 to pivot the holding means 70 about pin 66 anddisengage catch 82 from collar 58.

The holding means 72 is similar in construction and operationto holdingmeans 70- and comprises a substantially horizontal portion 88 integralwith a substantially vertical cam follo we-r portion 90. The horizontalpor tion 88 is provided with :a pin 92 against which is acting one endof a leaf spring 94 having the other end thereof anchored by means 81.The leaf spring 94 acts to bias the holding means 72 upwardly so that acatch 100 on means 72 will engage the carrier head portion 50 and holdit until the cam follower 90 actuated to release head portion 50 bymeans of pin 96 on gear 30 contacting portion 98 of follower 90.Suitable means may be provided to retain the holding means 70 and 72 onthe pin 66, as for example, cotter pin 102.

At this point, the indicator 28 is released and the timing device startsto operate. The clock-work mechanism will drive the indicator 28 back toits starting position at zero and during the time interval it takes todo that, the camera 12 will be automatically started and stopped asfollows. The pins 84 and 96 are positioned on the gears 30 and 32 sothat 'when the gears are adjusted relative to each other the pin 84 willbe advanced relative to the pin 96. Therefore, when the clock-workmechanism 24 is released for action, the gears 30 and 32 will rotate asshown by the arrows in Figure 5. The pin 84 on gear 32 will thus bebrought against portion 86 on cam follower 76, whereby holding means 70will be pivoted so as to release catch 82 from collar 58, therebypermitting spring 64 to push collar 58 and its associated control member54 forwardly against the less powerful spring 62.

The control member front end 57 will pivot lever 114,

7 which will in turn depress camera actuating switch 116.

I lease catch 100 from the carrier head portion 50, thereby permittingspring 62 to push collar 58 and its asso- For purposes of illustration,the improved timing detrols of camera 12, an adapter means includingplate;

110 may be suitably attached to the front end of the timing device, asby means of screws 112. The plate 110 carries means 113 on which ispivotally supported a lever 114 adapted to have one end thereof abut theforward end 57 of control member 54 and to have the other end thereofabut the actuating switch 116 of camera 12.

It will be understood, that when the timing device is applied to acamera, a clock-work mechanism 24 will be used which will be calibratedto operate in seconds or minutes, as desired.

If the operator of the camera desires to include himself in the pictureto be taken by the camera, he first decides how much time he wants tohave to get in front of the camera and get positioned, before the timingdevice starts the camera. Accordingly, in order to set the timing devicefor this pre-picture interval, the timing device indicator 36 is pushedinwardly to the position 42 to disengage driven gear 32 from drive gear30. The indicator 36 is then turned counter-clockwise, as viewed inFigure 1, to the correct indicia marking, as for ex-' ample if theclock-work mechanism is operating in seconds. Then the indicator 36 isreleased to permit spring 38 to move the shaft 34 axially forward andreengage driven gear 32 with drive gear 30.

The next step is to set the camera running time by means of indicator28. This is accomplished by turning indicator 28 clockwise, as viewed inFigure 1, to an indicia reading equal to the 15 seconds pro-picture timeplus the desired running time. If a second running time is desired thenindicator 28 is set at seconds.

Before the indicator 28 is released, the control member 54 is pushedinwardly until the front end 104 of collar 58 is caught and held bycatch 82 on holding means '70. The carrier member 48 is also pushedinciated control member 54 backwardly and thus release the cameraactuating switch 116 to complete the cycle. The indicator 28 will havebeen returned to its initial starting position and the timing device isready for another cycle setting.

Figures 6, 7 and 8 show a second timing device embodying the principlesof the invention. This second timing device comprises a housing or bodymember having side walls 120 and 122, front and back walls 124 and 126respectively, and a top wall 127. A bottom wall may be provided ifdesired. The back wall may be suitably fastenedto the side walls as byscrews 128.

As, is best seen in Figure 7, a conventional clock-work mechanism 130,similar to mechanism 24, is provided between the front wall 124 and theback wall 126 and may be held therebetween by any suitable means. Theclock-work mechanism 130 is adapted to drive the shaft 132 which fixedlycarries on the front end thereof a control element or indicator 134. Onthe rear end of shaft of the pin 149. This structure permits the drivengear wardly until the rear edge 106 of carrier 50 is caught j i 142 tobe adjusted relative to the drive gear 136. As is best seen in Figure 6,the shaft 144 is permitted to move in a slot as 151 in the front andrear walls. The carrier 148 has a lower projection 150 engaged by aspring means 152 which is anchored to the side wall 120 as by means ofscrew 154. The spring 152 acts to bias the gear 142 into a meshableengagement with gear 136. A stop member 156 is provided to control theaction of spring 152. i

A carrier member 160 is slidably mounted in an aperture 162 in side wall122, and is provided with a head portion 164 "and an aperture 166 inwhich is slidably carried the rear end of a control member 167. Thefront end of control member 167 projects through the aperture 168 in thefront Wall '120 as is shown at 170. A collar 172 is fixed on the controlmember 167 at an intermediate position and a spring biasing means 174 iscarried on the control member 167 between the collar 172 and the frontwall 120. A spring biasing means 176 is carried by the control means ormember 167 between the collar 172 and the head portion 164.

A journal member 178 is mounted in the rear wall 126 bver the drivengear 142 and carries a rotatable pin 180. Fixedly mounted on the outerend of the pin 180 is a lever 182. The pin is held in the journal member178 by the screw 184. The lever 182 is adapted to engage a pin 186mounted on the driven gear 142. Operatively mounted on the inner end ofthe pin 180 is a cam 188 which is biased upwardly by a spring 190 andwhich has a catch thereon 192 adapted to engage and hold the collar 172.A second journal member 194 is provided above the drive gear 136 andcarries a pin 196 which has a lever 198 suitably fixed on the outer endthereof. The pin 196 is held in the journal by a screw 200. The lever198 is adapted to engage a pin 202 on the drive gear 136. Operativelymounted on the inner end of the pin 196 is a cam 204 which is biasedupwardly by a spring 206 and which has a catch thereon 208 adapted toengage and hold the carrier head portion 164.

The operation of the second embodiment shown in Figures 6, 7 and 8 issimilar to the first embodiment. The only difference being that theactuating pins 186 and 202 are located on the outer sides of the gears142 and 136 respectively, rather than on the inside as shown by thefirst embodiment. This difference calls for different- 1y formedreleasable holding means 188 and 204 but they operate the same as theholding means 70 and 72 in the first embodiment. A second differencecomes in the way that the driven gear 142 is disengaged from the drivegear 136. In the second embodiment the driven gear 142 is pivoted aroundpin 149 to a position as shown by numeral 210 to permit adjustment ofthe gears. Other than the enumerated differences the first and secondembodiments function similarly.

A third embodiment embodying the principles of the invention is shown inFigures 9 through 12. The main difference between this third embodimentand the first and second embodiments lies in the means for operating thereleasable holding means.

The numeral 250 represents the front wall of the timing device housing,which is also provided with a top wall 252, bottom wall 254 and rearwall 256. The side walls are numbered 257. The timing device is providedwith a carrier member 258, similar to that in the other embodiments, andhaving a head portion 260 and an axial aperture 262 in which is slidablycarried the rear end of a control member 264. A collar 266 is fixedlycarried on the control member 264 and secured thereto as by a set screw268. A biasing means 270 is carried by the control member between thecollar 266 and the front side wall 257. A biasing means 272 is carriedby the control member 264 between the collar 266 and the head portion260.

A pair of releasable holding means 274 and 276 are pivotably mounted ona pin 277 which is suitably carried by the front wall 250. The holdingmeans 274 and 276 have attached thereto downwardly extending camfollower arms 278 and 280 respectively, and said means are biasedupwardly by spring means 282 and 284 which are anchored by pin 277. Thereleasable means 274 is released by means of the cam 286 on cam disk 288engaging the cam follower 280. The releasable means 276 is released bymeans of the cam 290 on cam disk 292 en gaging the cam follower 278.

The cam disk 292 is fixed on the shaft 294 of the clockwork mechanism296 which is suitably fixed to the rear Wall 256. The cam disk 292carries a stop member 298 adapted to abut a similar stop member 300 onthe stationary clock-work mechanism 296. A ratchet wheel 302 havingratchet teeth 304 is fixedly carried on shaft 294. A spring washer 306is disposed between ratchet wheel 302 and cam disk 288. Cam disk 288carries a pawl 308 adapted to engage the teeth 304 on ratchet wheel 302.

The front wall 250 is provided with an aperture 310 in which is slidablymounted a shaft 312 to which the cam disk 288 is fixed and in which theshaft 294 is slid- 6 ably mounted. A spring means 314 is provided intermediate cam disk 288 and the front wall 250 and is adapted to bias thecam disk 288 rearwardly. -An indicator 316 is fixed on the outer end ofshaft 312 and cooperates with an indicia ring 318 on the outer face ofthe front wall. 250 to facilitate setting the timing device.

In operation, the embodiment of Figures 9 through 12 would be set for apre-picture time by pulling out on in dicator 316 so as to disengage thepawl 308 from ratchet teeth 304. The indicator is then turnedcounter-clock wise and set according to the inner ring of indicia. Whenthe desired time mark is reached the pawl 308 is again allowed to engagethe ratchet teeth 304. The in dicator is then turned clockwise to thedesired running time according to the marking on the outer ring ofindicia. The indicator is then released and the control means will beoperated in a manner similar to the first two embodiments. The bigadvantage olfered by the third embodiment over the other two timingdevices is that the third type is more compact and can be made cheaplyand easily.

Although only one control member has been shown in all the threeembodiments, it will be obvious that more than one control member couldbe used, but of course additional pairs of gears and release means wouldalso have to be employed. Such a plural arrangement may be useful ifmore than two operations are desired.

It will also be understood, that the present timing device is notlimited to use on a camera, but that it may be used generally on manyother timing operations.

While it will be apparent that the preferred embodiments of theinvention herein disclosed are well calculated to fulfill the objectsabove stated, it will be appreciated that the invention is susceptibleto modification, variation and change without departing from the properscope or fair meaning of the subjoined claims.

What is claimed is:

1. A timing device comprising, a timing mechanism, a first rotatablemeans operatively connected to said timing mechanism, a second rotatablemeans operatively connected to said first rotatable means, -a movablymounted carrier, a control means movably mounted on said carrier, 2.first releasable holding means engageable with said carrier, a secondreleasable holding means engageable with said control means, saidholding means being operative to hold said control means and carrier inan operative position, whereby when said timing mechanism is actuatedfor a first predetermined interval, said second rotatable means willrelease said second releasable holding means to permit the control meansto initiate a cycle of operation, said timing mechanism then continuingfor a second predetermined interval after which said first rotatablemeans will release said first releasable holding means to permit thecarrier to move the control means to terminate the cycle of operation.

2. The invention as set forth in claim 1 wherein, said first rotatablemeans is mounted co-axially with said sec- 0nd rotatable means.

3. The invention as set forth in claim 1 wherein, said first and secondrotatable means are mounted on parallel disposed shafts.

4. The invention as set forth in claim 3 wherein, the shaft carrying thesecond rotatable means is axially movable to permit the rotatable meansto be disengaged from each other and adjusted relative to each other todetermine said predetermined intervals.

5. The invention as set forth in claim 3 wherein, the shaft carrying thesecond rotatable means is laterally movable relative to the shaftcarrying the first rotatable means to permit the rotatable means to bedisengaged from each other and adjusted relative to each other todetermine said predetermined intervals.

6. A timing device comprising, a timing mechanism, a first rotatablemeans operatively connected to said timing mechanism, a second rotatablemeans operatively connected to said first rotatable means, a movablymounted carrier a control means movably mounted on said carrier, abiasing means operatively engaging said control means, a firstreleasable holding means engageable with said carrier, a secondreleasable holding means engageable with said control means, saidholding means being operative to hold said control means and carrier ina cooked position against the action of said biasing means, whereby whensaid timing mechanism is actuated for a first predetermined intervalsaid second rotatable means will release said second releasable holdingmeans to permit said biasing means to move the control means to aposition to initiate a cycle of operation, said timing mechanism thencontinuing for a second predetermined interval after which said firstrotatable means will release said first releasable holding means topermit said biasing means to move the control means to a position toterminate the cycle of operation.

7. In a timing device, a control member, a carrier member, said controlmember being movably mounted on said carrier member, a first biasingmeans disposed intermediate said members, a second biasing means carriedon said control member, a timing mechanism, a first means releasablyengageable with said control member and being operable by said timingmechanism at a first predetermined interval to permit said first biasingmeans to bias said control member into an operative position to initatea cycle of operation, and a second means releasably engageable with saidcarrier member and being operable by said timing mechanism at a secondpredetermined interval to permit said second biasing means to move saidcarrier member and control member into an inoperative position toterminate the cycle of operation.

8. The invention as set forth in claim 7 wherein, said first and secondmeans include a plurality of releasable holding means and cam means foroperating said releasable holding means.

9. The invention as set forth in claim 7 wherein, said first and secondmeans include a plurality of releasable holding means and gear means foroperating said releasable holding means.

10. In a timing device, a control member, a carrier member, said controlmember being movably mounted on said carrier member, biasing meanscarried on said control member and operatively engaging said carriermember, a timing mechanism, a first means releasably engageable withsaid control member and being operable by said timing mechanism at afirst predetermined interval to permit said biasing means to move saidcontrol member into an operative position to initiate a cycle ofoperation, and a second means releasably engageable with said carriermember and being operable by said timing mechanism at a secondpredetermined interval to permit said biasing means to move said carriermember and control member into an inoperative position to terminate thecycle of operation.

11. In a timing device, a control member, a carrier member, said controlmember being movably mounted on said carrier member, a first biasingmeans disposed intermediate said members, a second biasing means carriedon said control member, a timing mechanism, a first rotatable meansoperatively connected to said timing mechanism, a second rotatable meansoperatively connected to said first rotatable means, a first releasableholding means engageable with and operable by said first rotatablemeans, a second releasable holding means engageable with and operable bysaid second rotatable means, said holding means being operative to holdsaid control member in a cocked position against the action of saidbiasing means, whereby when said timing mechanism is actuated for afirst predetermined interval said second rotatable means will releasesaid second releasable holding means to permit said first biasing meansto move the control member to a position to initiate a cycle ofoperation, said timing mechanism then continuing for a secondpredetermined interval after which said first rotatable means willrelease said first releasable holding means to permit said secondbiasing means to move the control member to a position to terminate thecycle of operation.

12. In a timing device, a timing element adapted to be rotated manuallyin one direction from a starting position to determine a time intervalfor an operation, clockwork means connected to said timing element forrotating said element in the opposite direction to return it to thestarting position, drive means connected to said clockwork means, adriven means operatively connected to said drive means and beingadjustable relative to the drive means, an actuator movably mounted onthe device for starting a cycle of operation, a first releasable holdingmeans engageable with said actuator, a second releasable holding meansengageable with said actuator, said holding means being operative tohold said actuator in an operative position, said driven means beingengageable with and adapted to operate said second releasable holdingmeans, said drive means being engageable with and adapted to operatesaid first releasable holding means, whereby when said clock-work meansdrives said timing element towards the starting position, at apredetermined portion of the time interval set by the timing element,said driven means will operate said second releasable holding means topermit the actuator to initiate a cycle of operation, and when thetiming element reaches the starting position said drive means willoperate said first releasable holding means to permit the actuator toterminate the cycle of operation.

13. The invention as set forth in claims 12, wherein, said drive meansincludes a cam means and a ratchetwheel, and said driven means includesa cam means and a dog adapted to operatively engage said ratchet-wheel.

14. The invention as set forth in claim 12, wherein, said drive meansincludes gear means, and said driven means includes gear means meshablewith the gear means of the drive means.

15. In a timing device, a timing element adapted to be rotated manuallyin one direction from a starting position to determine a time intervalfor an operation, clockwork means connected to said timing element forrotating said element in the opposite direction to return it to thestarting position, drive means operatively connected to said clock-workmeans, a driven means operatively connected to said drive means andbeing adjustable relative to the drive means, a control member, acarrier member, said control member being movably mounted on saidcarrier member, a first biasing means disposed intermediate saidmembers, a second biasing means carried on said control member and beingof a strength less than said first biasing means, a first releasableholding means engageable with said carrier member, a second releasableholding means engageable with said control member, said holding meansbeing operative to hold said control member in a cocked position againstthe action of said biasing means, said driven means being engageablewith and adapted to operate said second releasable holding means, saiddrive means being engageable with and adapted to operate said firstreleasable holding means, whereby when said clock-work means drives saidtiming element towards the starting position, at a predetermined portionof the time interval set by the timing element, said driven means willoperate said second releasable holding means to permit said firstbiasing means to move the control member against the biasing action ofsaid second biasing means to a position to initiate a cycle ofoperation, and when the timing element reaches the starting positionsaid drive means will operate said first releasable holding means topermit said second biasing means to move the control member and carrierto a position to terminate the cycle of operation.

16. A timing device, comprising: a housing having a front wall and apair of side walls; a control member disposed in said housing and havingthe outer end thereof slidably mounted through a first one of said pairof side walls and having said outer end extended outwardly of saidhousing; a carrier member having an axial bore and being slidablymounted through the second side wall and having an inner end providedwith an enlarged head disposed inside of the housing; the inner end ofsaid control member being slidably mounted in the bore of said carriermember, from the inner end of the carrier member; a collar fixedlymounted on said control member between the first side wall and the headon the carrier member; a first coil spring mounted on said controlmember and having one end abutting said first side wall and the otherend abutting one side of said collar on the control member; a secondcoil spring of a greater strength than said first coil spring mounted onsaid control member and having one end abutting the other side of saidcollar and the other end abutting the head on said carrier member; saidsprings normally tending to bias the control and carrier members to aninoperative position with the head on the control member against thesecond side wall; a first releasable holding means adapted to engagesaid head on the carrier member and hold it in an operative cockedposition in said housing when the carrier member is manually movedinwardly of said housing against the biasing pressure of said springs; asecond releasable holding means adapted to engage said collar on saidcontrol member and to hold it and the control member from being movedtoward said first wall by said second spring when said carrier member ismanually moved inwardly to the operative cocked position; a firstrotatable means mounted in said housing; a first release means carriedon said first rotatable means for engaging said first releasable holdingmeans when said first rotatable means is rotated for releasing saidcollar, whereby, said second spring will bias the collar and the controlmember outwardly of said first wall to an operative position; a secondrotatable means mounted in said housing; a second release means carriedon said second rotatable means for engaging said second releasableholding means when said second rotatable means is rotated for releasingsaid head, whereby, said second spring will bias the carrier membertoward the second side wall to the inoperative position and said firstspring will bias said control member inwardly of said first side wall toan inoperative position; a clock-Work means mounted in said housing andbeing drivably connected to said second rotatable means; means fordrivably and selectively connecting said second rotatable means to saidfirst rotatable means, whereby, the first release means on said firstrotatable means will release said first releasable holding means apredetermined time interval before the second release means on saidsecond rotatable means releases the second releasable holding means;and, means for setting said clock-work means for a predetermined timeinterval.

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